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Yield Line Analysis of Slabs
2

Yield Line Analysis of Slabs

Yield Line Analysis of Slabs

(OP)
Does anyone actually use this in practice?

I have been learning about it recently in an graduate-level advanced concrete class, and it is very interesting.  However, I am wondering if there is anyone out there who uses it.  It seems like there may be some hurdles to applying it in practice.  

RE: Yield Line Analysis of Slabs

I've used it.  I wouldn't design with it, but it's good for checking an existing slab, originally designed as one-way, for an increased load.  It's not going to give you n huge increase, but it might give enough for a changed use.

RE: Yield Line Analysis of Slabs

The first engineering work I ever did was supervising a load test on a concrete gym floor where the top reinforcing mats collapsed onto the bottom reinforcing steel.  Failure produced a classic yield line pattern.  The failure occurred in a technical institute and there was a structural group that I invited down to see the failure.  The contractor was not impressed that I marked the failure pattern out in permanent marker.

I used yield line to analyze a plate about 40 years ago (they had markers back then, too) where the columns were offset by half a bay.

I tried attaching a file on yield line (source unknown) but it is over 5 meg... and too large, I guess.

Dik

RE: Yield Line Analysis of Slabs

2
Really one can easily. One of the more common books on reinforced concrete here, the Montoya-Meseguer-Morán has tabulations for cases of slab I think to remember based in the yield line approach. Was quite used prior to FEM, the 70's and 80's.  I lately have met this thing mainly as the one of the limit capacities for a point load on a slab, as a function of standing flexural reinforcement. And likely when used cooked details or formulations for steel plates we are also using yield line approach.

http://civilearth.wordpress.com/2009/01/23/practical-yield-line-design/

RE: Yield Line Analysis of Slabs

(OP)
Thanks for responses, guys.

Dik,

Have you tried zipping the file before posting it?  


ishvaaag,

Are you supposed to be able to download a publication from that link?  I tried clicking the download link but it takes me elsewhere.

RE: Yield Line Analysis of Slabs

Hmmm you are right. The question is that I have this pdf. So from some place I downloaded it sometime ago. Will try to find the source and post.

RE: Yield Line Analysis of Slabs

(OP)
ishvaaag,

Thanks!

RE: Yield Line Analysis of Slabs

I've never done it for concrete.  That being said, I've used the analysis procedure from my concrete text to check cap plates for an existing building because I couldn't find any relevant info for steel plates.

RE: Yield Line Analysis of Slabs

Thanks for the link, Ishvaaag... that's the publication I was trying to upload.  Often *.pdf documents are well compressed.

Dik

RE: Yield Line Analysis of Slabs

The caution with yieldline is that it gives you a failure loading and pattern... hopefully it is the one with the proper minimised loading... it gives you no information about deflections or cracking to achieve that end...

Dik

RE: Yield Line Analysis of Slabs

I use it for foundations (wind turbine foundations normally) all the time. However for deflection controlled designs it isn't the best.

Arguing with an engineer is like wrestling with a pig in mud. After a while you realize that they like it

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